I have wild baby newborn bunnies to my house to raise. The mother was killed. The thing I have a question about most is when do I need to let them back out into the wild or should I find them adopted families since they'd be used to humans?

The babies might have diseases. But I understand you do not want them to die alone.

The reality is fewer than 10% of orphaned rabbits survive a week, and the care that people attempt to provide can be illegal, unnecessary, and potentially harmful. The best thing you can do is put the bunny right back where you found him.